Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
dap dung » dan dung, dap ung, cap dung
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than
ap dung » xay dung, van dung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - thanh tung ((dap dung) or (ap dung)) cong ((dan toan) OR (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh tung ((dap dung) OR (ap dung)) cong ((dan toan) OR (dan than)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh tung ((dap dung) or (ap dung)) cong ((dan toan) OR (dan than)) cau*".